I am reporting a typo in the MKIV XML-manual. It can put one on the wrong track.

Section 3.7 Setups:
\xmlsetup{name}{node} expands setup name and pass node as argument

Note that name and node in the parameters are interchanged. 
It should read: 
\xmlsetup{node}{name} expands setup name and pass node as argument

Hans van der Meer